The Fuel for Life
The fuel for life explains that all organisms need energy storage molecules (ESMs)—like glucose and fat—obtained from food to fuel biological processes including reproduction. In Amplify Science (California) Grade 7, Chapter 2: Energy and Changes to Populations, students learn that without sufficient ESMs, organisms cannot support the energy demands of reproduction, which affects population growth.
Key Concepts
All organisms need fuel to survive and reproduce. This fuel comes in the form of Energy Storage Molecules (ESMs) , such as glucose and fat, obtained from consuming food.
Organisms must convert the energy from these molecules to fuel biological processes. Without sufficient ESMs, an organism cannot support the energy intensive process of reproduction .
Common Questions
What are energy storage molecules (ESMs)?
Energy storage molecules (ESMs) are substances like glucose and fat that organisms obtain from food. They store chemical energy that cells convert into usable energy to power all biological processes.
Why do organisms need energy storage molecules to reproduce?
Reproduction is an energy-intensive process. Organisms must have enough ESMs to fuel cell division, growth, and all the biological processes involved in creating and raising offspring.
How does food availability affect population size?
If food is scarce, organisms cannot obtain enough ESMs to support reproduction. Without reproduction, births decrease, and the population may decline or stabilize at a lower level.
Where is the fuel for life concept taught in Amplify Science Grade 7?
The fuel for life is covered in Amplify Science (California) Grade 7, Chapter 2: Energy and Changes to Populations.